James barrett



(No Model.)

J. BARRETT, I. STEVENS 8u E. SUTHERLAND. SPROCKET CHAIN.

` 130,301,333. Patent-ed M314. 29,1893-,

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UNITED STATES PATENT f EEICE..

JAMES BARRETT, ISAAC STEVENS, AND ROBERT SUTHERLAND, OF MELBOURNE,VICTORIA.

sPROcKET-CHMN.

SPECIFICATION forming part of Letters Patent No. 601,333, dated March29, 1898.

I Application tied August 17,1897. seria No. 648,580. (No model.)

To all whom ama/y con/cern:

Be it known that we, JAMES BARRETT, ISAAC STEVENS, and ROBERTSUTHEELAND, subjects of the Queen of Great Britain, and residents of-Melbourne,in the Colony of Victoria, have invented certain new anduseful Improvements in Sprocket-Chains; and we do hereby declare thefollowing to be a full, clear, and eXact description of the same.

In the accompanying drawings, Figure l is a perspective view showing thechain geared with two sprocket-wheels. Fig. 2 is a similar View, on anenlarged scale, of the chain; andv Fig. 3 is a detail sectional viewtaken through the ends of the upper arms and rollers.

In said drawings, A represents an ordinary sprocket-wheel.

B represents a disk or hub, and C C represent lateral flanges fixed tothe sides of the hub B by rivets' c, though of course the flanges may beformed integral with the hub B, if desired. These angesC C are formedwith a series of radial arms D D, arranged in pairs, and the radialedges of each pair of arms are turnedoutward to form bearingfaces d d.

The chain consists of a series of links 'W and blocks X. To the rivetsof the chain lever-arms R R are fixed, the outer ends of these armsbeing connected in pairs by the bolts S S, which have sleeves mounted ontheir outer ends to engage the bearing-faces d d of the arms D D of thesprocket-wheel.

T T- represent diagonal braces, which eX- tend from the bolt S on onepair of leverarms tothe bolt U on the neXt succeeding pair to impart therequisite rigidity to the lever-arms.

Having thus described our invention, what we claim, and desire to secureby Letters Patent, is-

A sprocket-chain consisting of blocks and links pivoted together, armsarranged in pairs and secured to the pivots of said links, transversetoes at the upper ends of said arms, said toes consisting of a blockconnecting the arms of each pair, and provided with rollers on theirfree ends, and rods pivoted to the upper end of one set of arms and tothe in termediate portion of the adjacent set, substantially as setforth. u

In witness whereof we have hereunto set our hands in presence of twowitnesses.

JAMES BARRETT. ISAAC STEVENS. ROBERT STHERLAND.

Witnesses:

EDWIN PHILLIPS, CEOIL WOODS LE PLASTEIEE.

